Investing in Cryptocurrency is no different than stocks, other currencies, or even Pop Vinyls. The basic idea is:
You buy something
The price rises
You sell it for a higher price
Point 2 is the tricky part. The price can just as easily fall.
Bitcoin is a popular recommendation for investment because of how little novices know about it. They don't know ...
Rewards for cards or accounts don't count as taxable income, whether the rewards are cash or something else. So you won't owe any income tax on this.
However, cryptocurrencies are liable for capital gains tax if you make a profit on any sale in the future (if it's more than your annual CGT allowance). So you may need to keep a record of the value of any ...
Stock are normally traded on the stock exchange, where people offer them for money (in the form of dollars, or euros, etc).
Of course it is technically possible to trade them by offering to pay in Bitcoin (or other cryptocurrencies), but the normal stock exchanges don't offer that at this time.
You are basically on your own to find someone in the world that ...
Can you? Sure.
Will you? I certainly wouldn't bet on it.
I certainly wouldn't suggest that an unemployed person that is looking to generate income start day trading anything. When you lose your job, the last thing you want to do is pile on more risk. Beyond that, most people that day trade lose money. Those that do make money rarely beat the market ...