So I'd say $45k is roughly the absolute bottom, or maybe $40k just to be safe in case there is another massive round of FUD in the near future while Bitcoin is still low. I had another thread in which I said we'll never go under $50k again, basically it seems likely I was just about $5000 (or maybe $10,000) off in that statement.
It is very unreasonable for me personally to speculate about some absolute bottom at a time when one man with one of his posts knocks down the price by as much as $10 000 - and to say that the price can't go lower than $45k or maybe $40k is in the same category as your speculation proved inaccurate in just a few days. You also ignore the OP asking for a period of as much as 5 years, and no one can know what will happen in the next 5 days - the biggest FUD master can announce the news that he has sold $1.5 billion worth of BTC - and I don't see how that wouldn't result in breaking your absolute bottom.