Digital currency based on a blockchain.
Bitcoin can absolutely positively give you the volatility you need in your portfolio and increase your wealth immensely. "One does not simply short Bitcoin" but it is extremely profitable most of the time.
It must be noted that about 95% of those who try to trade it without any previous trading experience from forex or commodity markets lose everything within 3 months (Anonymous source within the Bitfinex exchange). This is probably not unique to Bitcoin, the same is likely true for other markets where clueless n00bs who couldn't read a candlestick chart if their life depended on it try playing with max-leveraged margin positions.
 That feel when no girlfriend
Bitcoin doesn't solve this, but it does allow you to buy stuff which reduces the pain.