Even if this possible scenario were to come true, wouldn't there be a way to profit from such scenario, rather than going away for "a couple of years"?
Wouldn't we want to attempt to buy more on the way down to the bottom in early to mid 2019? And of course, there might be other actions that can be taken, too.
Yes, thats the theory. Very few ppl would be able to successfully call the right timings and price. ..but good luck to anyone that goes for it.
Not tying to put ppl off, just pointing out that passive hodling is the safe strategy: you only have to make one correct call , and that is 'The price of BTC is still in a long term uptrend' (could just possibly be wrong, but the odds are at least in your favour).
The reality is that only a minority actually make much profit from trading, most is made from hodling.