What is your plan to invest with $50.000? all for btc or together with alt coins?
well actually, you can do almost anything and get stablelized in the future. You can start with trading some altcoins or try investin on ICO's. And start trading. With diffrent altcoins.
If you do that you will have many coins to be buy but for me if you want it so much to have many bitcoin, i think invest on those new coins. There has so many coins now there that has a good platform in their bounty campaigns. Try it.