[IAmEveryone]

Sure. And so has the IRS, which “persuaded a federal judge”, according to the article.

I guess they thought it was a reasonable request to get the data of the 25,000 US citizens who made significant profit with bitcoin in those years, when only a few hundred reported such earnings in total.

[chrisco255]

That's an estimate at best. How many if tbise who profitted actually cashed out?

[koolba]

It's not just a matter of tracking those that cashed out as taxes are on the net profits of individual trades. Even converting between coins (ex: sell BTC, buy ETH) is a taxable event.