Some types of passive income don't require any knowledge to invest in BTC.
Of course, if you wish to trade, education can take a lot of time. Because many factors change the price of the coin.
But, for example, with structured deposits everything you should know about Bitcoin - it is the name of this coin. Just make a deposit with protection up to 100% and get profit.
Cryptocurrency really interesting sphere, so, you will always learn something new.