Believing in such an opinion is a choice. Of course, if you don't have knowledge about crypto, this man can easily manipulate your mind. But if you have, you will just ignore it. Investing in Bitcoins depends on how we trust it. Many people will draw their views based only on negative reports but don't look at the positive side of it. Because despite the volatility of the market, we can prove that we are earning a profit. It means that it is not the problem and could never be our basis for future incompetence.
Bitcoin will always have doubters but they shouldn't be the people we should be listening to instead we should listen to only those who'll feed us with positive things about Bitcoin and continue to keep our hopes high because we need it for when the market looks hopeless and everything is falling apart. Without being convinced that the market has a future, many people will sell and be left with nothing, that's why we don't have to feed on the negative news but focus on the positive news about Bitcoin.
People who talk negatively are those who are not investing in Bitcoin in the first place. That is why I don't listen to these people because they are just straying away from reality. Instead of expecting support, they are selling the wrong information to the public. If we are new to crypto and hear those words, doubts will surely appear in our minds and question the credibility of Bitcoin. And sadly, many individuals are in this situation until they hear the right information they need.