Owning Bitcoin is always good, so you decided that correctly. Selling altcoins for it is okay, but if you want to play with higher gains or losses, then you should buy and sell altcoins. This is in most cases but with a lot of luck, you can also play at the roulette table something. On the other way, you will be very happy if you have bought a coin that has made a x10 and more. With bitcoin it will be less in the comparable time, but a more security not to lose everything, and with bitcoin you can be sure that it is denzentral.