Speculation is just betting.
An investment operation is one which, upon thorough analysis promises safety of principal and an adequate return. Operations not meeting these requirements are speculative
Even cold storage has the risk of being held at gunpoint to transfer it over. It's akin to having a bunch of cash/gold buried under your basement. If anybody knows it's there, you better be ready!
Please don't do this. Don't look at two points on a chart, the low and high, and think your the one in a million person who would have traded at those points. That type of thinking fuels bubbles.
With a speculative and volatile investment, you either get out immediately when it starts tanking or you take your 2-3X return and consider yourself smart and disciplined.
I wonder how much Satoshi is worth these days in BTC? Didn't he mine up a whole ton of coins back when it was trivial?