There are no guarantees on the crypto market. Digital currencies have nothing to do with the global economic system. They are not regulated by any authorities and are provided only by the forces of the investors themselves. Therefore, looking for some solid ground for growing guaranteed income is a thankless task. You can rely only on your knowledge of the market, no one will give you exact advice that by buying this or that coin you will become richer.
Study the projects, do not be lazy to double-check the information and then you will not need to look for the culprit.
Sensible advise but very few people are going to take the time to actually follow it, people just want to invest in a coin, forget about it and then after a few months get huge profits, the only coin that offers something remotely similar to that is bitcoin and even bitcoin does not allow you to do that as its volatility means that there are instances in which the market crashes and then it takes years for the market to recover similar to what happened in 2017, so you need to always watch the markets in case things begin to move on the wrong direction.