Investing in Bitcoin is a way to potentially increase our income. But it is important to keep in our mind that investing always carries risks and we might gain or loose profit. Make sure that we have a good understanding in Bitcoin make our own research and study the main concept of investing. Also we need to spread out our investment and do not put it in one basket and invest only what we can afford to loose.
Investment carries risk but earning does not carry that much, so you are providing services and getting paid back in crypto that is a good thing.
Now when it comes to investment, try to keep the higher risk investments aside, like day trading/newly launched altcoins and so on. These will require time to allow the investors to judge projects before investing, unlike the newbies who end up buying an entire shopping list and then lose all the money because they bought penny coin at a high.
I dont think you need to crack every single thing, but simple buying alt the low and selling at the high will work. Most people are not able to run that patiently and look for internet suggestions.