Investing is the best way to go about utilizing 21+ BTC. only to increase riches further.
thats true investing is a really great option to put your money into right now, though i dont know whether it wouldnt make you not lose all your money
But for me that is going to be a big capital already if you are going to invest whole 21 bitcoin with trading I would say that it is going to be better if you are just going to allocate 1/4 of that total amount.
Or else I am just going to keep on holding that for a long time and going to wait for the price of it to increase and once I am able to get profit with it.
Then I am going to sell it and going to start my own business in real life.