If x > 0 then x/0 = ∞
As outrageous as it may sound to say that bitcoin will be worth infinity dollars, it isn't a statement with that much gravity. It's merely another way of saying that the USD will go to zero.
Even if bitcoin falls from the #1 crypto, even if it goes down to 1 BTC = 100 ETH and no one hardly cares about it anymore, once the USD has ceased to be "money" it will have no value. So your .0000000001 bitcoin that can buy you only a candy bar with, will still be worth infinity dollars.
HODL my friends!!
The Best way and the most reliable one - find the gems (fundamentally strong projects which have strong team, a product in the mind to solve an important issue with high utility value). Ideally, it should have a reasonably deep moat vs. competitors. This is the recipie for success! Earlier or later the market will recongize the value of the project and will award you with immence profits. Real life example, RLC token (iExec) >+100% today! This pick was included in our portfolio yesterday and published here https://steemit.com/crypto/@p2port.com/crypto-portfolio-high-quality-crypto-assets-for-long-term-growth-created-on-11-january-2018