This year and the next year will be still about Bitcoin, many good alts will only start their product and platform, so that's absolutely the future, but not the close future...
Perhaps you are right, because it was not for nothing that experts said that more than 60% of altcoin lacked a real product. But in this regard, and also if we take into account the poor state of the cryptocurrency market, many coins will not have prospects.
How then to make a choice? If no analysis of sales is 100% guarantee of success, then you need to look for other opportunities to find the investment.