IMHO, I don't think the cryptocurrency market is a bubble, at least just yet. The so-called 'dumb money' might be entering the market right now because of the news coverage regarding USD10,000, but any ensuing crash will not last more than 2 weeks.
But bitcoin might stall if the scalability issues don't get fixed & I don't see the lightning network as a good or elegant solution.
In the next few months, users will experience many waves where the mempool is clogged, the fees go up & confirmation time takes many days, and they will get fed up.
So if the bitcoin price goes down in some semi-permanent fashion then it will be because the crypto market share is eaten up by the other coins.
It could be because of ethereum, bitcoin cash, litecoin etc.
I am Megatron, the BTC train has left, now get on the Tezos train and be rich you fools. ...
Bwa ahah ahahha ahaha
https://tezoschain.io/
This is a good response. There is too much big money coming in at one time which means games will be played. I hope the big time bitcoin money has the financial traders loose based on their unbelief coming in.