BTC works and BTC can be the key for a new economical future.

Why to use another coins based on it? Please OP, why use something that is already there and with a huge community on it?
bitcoin is strong, useful, powerful and necessary.

Other coins are just more and more experiments. I own more than one altcoin but not all of them have a great dev-team or strong project to really believe on it... you have coins that doge (huge community) XMR or another ones (with great projects) but bitcoin have something that the other ones can't have: be the first.