50 is unlikely. That's around half of bitcoin market cap. Lets get real for a second.

The days of 100x growths are behind us. It's already had that since the ICO. You are late to the party. If you want that kind of growth look for coins that are still in their early days. They way I see it, bitcoin will always hold around 50% of the market, and the rest will be divided by the other coins. Even if IOTA is a success and gets adopted, it may grow to #2, and in value maybe 2x-4x. That's still huge of course (and I'll still be in until it reaches #2), but the real fortunes have already been made.