Of course yes, i will still use bitcoins it stable at around $5000 USD, if it happens bitcoins will be currency because of the stabilised
the users will be mass adoption because they don't fear to volatility of bitcoins, one of reason bitcoins still can't be currency because bitcoins volatility is scary, the people are fear investment in the bitcoins, and I can still get the profit from trading alt coins than trading bitcoins fair fiat money.
the scenario itself impossible to happened , let's don't make an assumption on something unlikely to happened, nothing beneficial. bitcoin price would keep moving up and down maybe the close scenario to this is when the price only move a little bit like up for 1% and down 1% and so on. that's just make trader boring and investors to leave. bitcoin would remain volatile with its decantralization .
Still there are choice in digital coins if the problem on bitcoins is just getting profit from volatility of bitcoins, many alt coins out there that has huge volatility and big chance to get the profit, I am thinking about mass adoption of bitcoins around the world to be currency, it is not just an investment and in digital coins there are not impossible everything can happen couples years ago no one trust bitcoins will be $3000 today we saw more than it.