Many reason pointed out in the article to believe in the future of Bitcoin :
https://www.cnbc.com/2018/05/26/bitcoin-still-a-buy-says-blockchain-venture-capitalist.htmlAlso a good statement about ethereum and its relation to ICOs:
"Bogart said he's especially cautious with ethereum, which he said has a lot of overhang because so many initial coin offerings (ICOs) have been built on top of ethereum. He pointed out that if the ICOs don't work out, that could be bad news for the platform its built on. "
It's all just opinions, so my is that it will hit 20k, and I am coming back to this post to say I was right lol.
The value of bitcoins will be growing even more and surpass the previous price because there are a lot of people in the market who is investing in the market which will leads for the price to grow and there are countries as well that legalizing bitcoins in their area so we can expect for the price to increase even more in the future due to high demand in the market.