To multiply BTC its like a very long-term investment, but u can just try and go on bounties and  u can try also to break ur cash if u have a good amount to invest it in alts, they can prove quite  profitable, now with the up-coming market will be interesting  to see some good numbers, i think its a good opportunity to buy some alts, you just need to check and have a good research to see where u could actually have a good profit