Bitcoin is a block-chain based trustless digital currency suitable for larger payments and transactions. It's slow block rate and high fees make it unsuitable for micropayments and every-day transactions.
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. This is probably not unique to Bitcoin, the same is likely true for other markets.
- Anonymous source within the Bitfinex exchange