I think it is better to start thinking and making use of stop loss. If you will have to wait to do any of this thing you might end up losing more because bitcoin dump happen so fast so in that case you can minimize ur loss by converting into fiat however the challenge will be the extent to which the drop will be. Sometime, price drop rapidly because people take huge profit and rise back with time. When the price drop like this it creates a fear that make traders not to be sure of when to start trading again
It is better to have stop loss at any point. Sure you could have a bit more lax stop loss when we are in a bull run, considering it like this, if you bought bitcoin at 10k and price peaked over 20k you could have a stop loss at 15k and still make 50% profit, if it goes over 30k and you put it on 20k that means you could profit double even when it falls down big. So, basically on a bull run putting a stop loss is easy but it should be done nevertheless because that is how it should be.
On a correction, or stable price, or a crash you should have a stop loss even more importantly, because that would be the number one thing that would make your situation better. If you bought at 30k for example, have it at around 28k or so in order to save yourself from a huge fall when that happens, if that doesn't happen your stop loss would be useless and that's fine, but if it happens you would be happy about it.