I've noticed in the past weeks this forum section becoming less popular/busy, with seemingly less new people coming into the crypto space. This is expected in an aggressive bear market, and it will be interesting to see if this board becomes more popular if prices start to rise again. It could well be considered another metric, similar to google trends, that indicates an increased interest in the market again.
It's worth remembering that the market doesn't need new investors to enter in order to bounce back however. There are many short and long term investors who took profits when Bitcoin was at $20k, $15k, $10k etc that will be looking to re-enter their profit into market when it's looking favorable. It's also likely this "money on the sidelines" will re-enter at a rapid pace, for those who weren't dollar cost averaging back in, with longer term investors willing to risk losing some of their profits short-term to avoid missing the long-term growth again.
This is obviously just a theory, but it would be simiplar to what happened in 2015, when initally it was money returning to the market, as opposed to new money entering which occured in 2016-2017 when the market had returned to bullish.