There are several ways to reinvest crypto to earn more crypto. Here are some examples:
Breeding: cryptokitties, fishbank, etc.
Resale: openbazaar, landhodler, etc.
Gambling: bitstars, mbit, betcoin and others.
Has anyone had experience with these sites? Are there other examples of reinvestment?
If you want to earn more crypto than the one you are holding then you do not really have any other option but to begin your career as a trader, traders can multiply the amount of coins they are holding in a relative short amount of time but it is not easy, the majority of traders fail and lose their money so before you try to do it take your time and try to find a way to make money in the markets before you trade, if you can do that then you will accomplish your goal of getting more crypto without using fiat in the process.
I've got your point there, Indeed, those given links above are risky to try. Earning more in crypto is not just an easy way, those trading and gambling are very risky you need to manage it well because some of them get lose and failure in that kind of business.
I didn't try that site, I much preferred on investing and holding my crypto assets and wait for the right time when bullish will happens.
Without withdrawing fiat currency is depends on how you control your self not to withdraw into fiat.
Holding and investing is risk free compared to that of gambling and trading. With trading you'll be earning big, but with holding a long term profiting is assured. Also the fund sits in the wallet without use. In between if used on trading this will contribute to the circulation as well earns a small earning upon the volume in wallet. For holding large funds were the one that can generate profit.