I think only long-term investments and in sufficient amounts can give u a good profit. One, in such investments, the main thing to know that u`ll definitely get a profit, in the case of no, it will be very frustrating after months of waiting to get a minus.
In fact, this is not true for long-term investments that can make a good profit. I think that if in the past, long-term investment may bring good returns, but the current environment is undergoing earth-shaking changes, so the current long-term Investment does not always result in income, but it may result in losses.