No one knows the real answer, we can't really say that the bitcoin is a bubble and it will burst soon, will have no value, Bitcoin is definitely here to stay, and I'm sure with this level of demand people will never let it fall below 7-8k $. Also it's not correct to compare it with other bubbles with different characteristics, because this time it's not only bitcoin, it's like a new ecosystem , crypto currency market, so everyday new money is coming in and market cap is growing and when bitcoin price starts to go down people jump on other coins so instead of one asset crashing like Tulip, there are many other side assets as parking slot. Okay we can say that whole market can crash together like .com bubble but I still can't really compare crypto to .com bubble as there were companies and profit expectations, which people really over value at that time and then find out most of them make no profit, meaningless investment.. So with Bitcoin there is no company, no owner, no one to look up or blame, we don't expect any annual return or growth, it's just a currency/commodity with a limited supply and high demand. It might be overvalued in last couple of weeks, it might correct.. but I don't think it will ever crash to zero or close..