Details: https://cryptotown.io/news/wall-street-bitcoin-bull-tom-lee-predicts-massive-outflow-of-crypto-before-tax-day-cointelegraph/index.html
This is a good article and this could explains why the price of bitcoin is dropping in value. Aside from the negative news about banning of crypto and ICO's this article explains clearly why there is a huge drop. This is all because of the exchanges selling huge volume of btc's to pay their taxes. And I do hope that Tom Lee is right that after April 17, 2018 bitcoin will start rising up again.
Well the date wasnt far off but I dont think it was the only reason for selling just it helped tip the boat and we took water and sank a little lower then we might have otherwise. Any time sellers occur in confluence this is a danger, unless buying is also occuring for very high volume perhaps.
At what tax rate is this payable, wont it vary for everyone and with able to offset losses and costs against gains. Perhaps thats just business, but the case is perhaps slightly oversold. The rebound now would be part of that doubt being lifted, perception can alter market trends not just the actual selling.