I predict and can easily see the crypto market cap dropping to around 100-150 billion. No proof, just some genie plus a magic 8 ball is telling me this. Everybody is saying 2018 will be like 2017 soon, with some huge gains. Everybody and I mean everybody is predicting a 1-2 trillion market cap, so the ONLY possible way for people to get 10-20x gains like last year, is for the crypto market cap to drop down to around 100 billion. Haters prove me wrong.
Right now the market is below 200 billion, I do not know if it's going to go as low as you predict but the possibility is there especially if some of the big altcoins begin to collapse, because even if I think that the price of bitcoin can still go a little bit lower there is going to be a lot of resistance for that to happen, but if some of the big altcoins begin to drop then we may see a market cap close to what you are predicting.