I never think bitcoin can go back to $600.
Right now it stays at $6000+ and it seems impossible to go down further more already. Having it going down needs a lot of sell volumes which I don't think we can have enough to break all decent supports at 6k, 5k.
Anyway, your decision of staying away from bitcoin for 5 years may pay off. The market is really boring right now.
This is not completely impossible. It would be a crypto black swan but it can happen. The Bitcoin wealth distribution is very uneven as there are a few guys including Satoshi himself who have many-many thousands of bitcoins in their pockets. And any of them could easily bring the prices down below $1000, if not a way lower than that, even to double digits. You would ask why they might want to do that. Honestly, I don't know, but this is a black swan event after all, so if it is possible to happen, it might happen for one or another reasons. For example, we can't exclude the possibility of someone stealing from one of these guys, and then dumping all these coins in the open market crashing the prices and wreaking total havoc in the market, basically destroying it.