Try to get yourself into gambling sites where you can play dice and card games to play and earn the bitcoin in turn. These game are actual made for paying into BTC only and there are some of the alts projects which will help you get paid in alt token which you can later on trade for the BTC so thats one and the same thing.

Instead of this you can also checkout HI-LO game and you will find this mostly on the gambling websites. There are no sites which are dedicated to it only but they will always include such versatile games for the user. These sites will take lot of time and money from you so be cautious about how you approach to them.