Why almost every modern scheme is chargeable as wire fraud. There is no general federal offense of fraud. The federal government prosecutes the channel used, which is why the two workhorse statutes are mail fraud at 18 USC 1341 and wire fraud at 1343: the same conduct with a different means of transmission. Because nearly every contemporary transaction involves an email, a message, a call or a web form crossing a state line, the wire count is available in the great majority of cases. That is the reason a victim who describes what happened as a scam finds the prosecution proceeding under a heading that never uses the word.
The two penalty tiers, and what triggers the higher one. The base sentence at 1343 is "fined under this title or imprisoned not more than 20 years, or both." The statute then provides that where the violation "occurs in relation to, or involving any benefit ... paid in connection with, a presidentially declared major disaster or emergency ..., or affects a financial institution", the offender "shall be fined not more than $1,000,000 or imprisoned not more than 30 years, or both." The financial-institution limb is the one that bites in ordinary cases, because a scheme that moves money through banks frequently affects one.
The same enhancement doubles the time the government has. The general federal limitation period is five years, under 18 USC 3282: no prosecution "unless the indictment is found or the information is instituted within five years next after such offense shall have been committed." But 18 USC 3293 provides that for a violation of section 1341 or 1343 "if the offense affects a financial institution", no prosecution may begin "unless the indictment is returned or the information is filed within 10 years after the commission of the offense." So the same fact that raises the maximum sentence also gives prosecutors twice as long to bring the case.
An attempt is treated as the finished offense. 18 USC 1349 provides that "any person who attempts or conspires to commit any offense under this chapter shall be subject to the same penalties as those prescribed for the offense, the commission of which was the object of the attempt or conspiracy." A scheme that failed, or that was interrupted before any money moved, carries the same statutory exposure as one that succeeded, and each qualifying transmission can support a separate count.
What a victim actually gets, stated as what the statutes provide. Section 1343 is a criminal statute; it prescribes punishment rather than compensation. Two other provisions supply the routes that do exist. Under the Mandatory Victims Restitution Act, 18 USC 3663A, a court sentencing a defendant convicted of a qualifying offense "shall order ... that the defendant make restitution to the victim of the offense", and 3663A(c)(1) reaches an offense against property under title 18 "including any offense committed by fraud or deceit" where an identifiable victim has suffered pecuniary loss. The word is shall: restitution is mandatory rather than discretionary, though 3663A(c)(3) lets a court decline where the number of identifiable victims makes restitution impracticable or the factual issues are too complex. It also depends entirely on there being a conviction, and on the defendant having assets.
Separately, wire fraud is a predicate offense for RICO, listed at 18 USC 1961(1). RICO's civil action at 18 USC 1964(c) lets "any person injured in his business or property by reason of a violation of section 1962" recover treble damages, costs and a reasonable attorney's fee. Two conditions limit it sharply: the claim requires a violation of section 1962, which needs a pattern of racketeering activity rather than a single fraudulent email, and 1964(c) expressly bars a private plaintiff from relying on conduct "that would have been actionable as fraud in the purchase or sale of securities" unless the defendant was criminally convicted in connection with it.
Where the practical value of the offense sits for someone who has lost money. It is chiefly in the reporting, not in the charge. Federal intake exists precisely so that transactions can be traced and, sometimes, frozen while they are still recoverable, and speed is what determines whether that works. The reporting routes and the recovery mechanics are shared across every kind of fraud and are treated together on the fraud page rather than repeated here. The commercial-law question of whether a sent wire can be pulled back is a different question again, governed by state law adopted from the Uniform Commercial Code, and is treated on the wire transfer page.