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.
Bitcoin was a good buy even at the all time high, the problem is that all of those that bought wanted to multiply their money immediately but instead they got short term losses, but if someone is willing to hold his coins for years I have no doubt that even those that bought at such a high price still have big chances of making substantial profits in the next 5 years.