Tax implications of selling cryptocurrencies
When I file my taxes for 2018 I will report any amount I cash out as a capital gain.
What I'm worried about is that should I be audited, I have essentially no papertrail to back up where I originally acquired these coins from. And I've transferred coins through so many different cryptocurrencies and exchanges, it's basically impossible to trace their history to my original acquisition (which was some time in 2013 using cash).
Is the lack of documentation something I should be concerned about under audit? Basically the only paperwork I will have will be the withdrawl statement from quadrigaCX