if I were you I would invest in the most popular crytocurrency at the moment, because they have become popular for a reason, that reason being that they have performed well on the stock market and they have outperformed all other digital currencies available in the world at the moment. Of course they are more expensive and you will also need to read up on all of the most popular ones and choose maybe two or three to invest in. It is not possible to invest in all of the popular ones at the same time, but it is good to diversify among them.
This is the right strategy especially if you give a lot of weight to bitcoin, those that want to earn 100x their investment have not really invested a significant amount of money in this market, if you invest in the top coins when the next bull market comes you could easily earn 5x your investment and if you invest a significant amount of money then a growth of 5x in just a few years is more than enough to change your life, so there is not a reason to take a risk with coins you do not know if they are going to be here for long.