These people believe in blockchain that's what probably is the main reason why bitcoin was established, it was only then some are only here to profit from it.
Now there are tokens that has huge potential to make it on top of the marketcap, blockchain users are more into investing to its product with also attracts the people from other markets like from the forex.
separate interest in choosing cryptocurency. there are so many reasons why someone prefers cryptoccurency rather than forex, etc. because an easier process and high profitability is enough to attract investors to invest in cryptoccurency