2012 was eons ago in relative price terms for most places. Dollar hasnt really gone up in price or done well or returned alot to people who held it, where BTC has gained alot in its general economy and development over time.
The spikes make it hard to follow but I would only really keep around the change I have left over from usage. I'm not the kind of person to recommend people keep back large amounts and just hope, because we can swing down and back up easily over what time frame nobody is sure.
I dont think betting is in a bear market overall. Its possible its developing various markets, I cant say which directions will be most positive but gaming in general, involving money or not is bullish imo