Stocks give like 20-30% returns in an year but bitcoin and other crypto coins can give this much return in just one day. At such, do you think that increasing popularity of bitcoin has reduced interest of people in stocks.
Perhaps, earning huge amounts is a big factor why some investors are spending more funds on crypto than on stocks. But it doesn't mean that they are totally leaving stock, they are just multiplying their investment. But for those who can't afford to take high risks like investing in crypto, stocks will be their fall.
For me, it never reduces interest in the community, in fact, not all are also interested in crypto the same thing as stocks. People will go to what they feel is comfortable and safe.