Bitcoin is a bit of a joke - laughable. Whoever puts their (real) money into it is risking a total loss because there's no real value in a Bitcoin, or any other cryptocurrency. All they have going for them is scarcity ("only 21 million Bitcoin will ever be minted") and hype, and the price is mostly determined by hype. Nothing lies behind a Bitcoin, neither governments nor assets. You pay out thousands and have to wonder what it's for. Comparison with tulips and the dotcom bubble are apt; caveat emptor!
In my opinion it is not a bubble, since today many important companies have gotten into the market, large companies are creating their own currencies, important people are supporting it as the currency of the future. We are in a technological age that we do not know where we are going to arrive, but what if we are sure that more and more the cybernetic world is in a constant growth, and it is there where it enters into the concept of Cryptocurrency, being a currency perfectly applicable to hiring of services, in a faster and safer way. These months have been hard for the bad news from China, Korea, among others, but in a short time the good news will begin focused on regulations and acceptances in banks and governments. It is a change of mentality and financial system.