I think we are in a bubble regarding the high number of existing coins (more than 1500 on coinmarketcap alone, then there are tons
of other coin NOT on coinmarketcap)...so I think this number will continue to grow during 2018 and then there will be a huge disappearing
of many many projects/coin. I don't think the total market cap will be lower, though...so BTC and other main coins (ETH, XMR) will see higher and higher
market caps at the expense of other minor coins