Can the IRS track Crypto transactions?

Could you elaborate on the extent to which the Internal Revenue Service (IRS) is capable of tracking cryptocurrency transactions? Given the decentralized nature of cryptocurrencies, does the IRS have the technological means to trace individual transactions? Are there specific measures that cryptocurrency users should take to ensure compliance with tax regulations while maintaining their privacy? How do the IRS typically identify and investigate potential tax evasion cases involving cryptocurrencies? Is there a legal obligation for cryptocurrency exchanges to report user transactions to the IRS?