Cryptocurrency is not a bubble. Crypto market's prices goes down and people think like this directly that Cryptocurrency is a bubble and always goes down more and more. People should be patience that is key of cryptocurrency. You should hold your coins and dont worry.
Current price fluctuations are not enough to prove this negative opinion, but if bitcoin continues to run independently with increasingly large holders, it can be ascertained that the bubble will become real because there is no strong control to make the market stable, there will be a lot of price manipulation by certain parties and this is what the world feared.