...so when it comes to old altcoins only the ones that are the most solid and that have the most recognition have any chance of breaking their previous all time highs.
I second that as well, like Ethereum as an example, imo, it's pretty different from other coins considering how stable eth has been for the past couple of years, and thus as expected it broke it's former all time high during this Bitcoin bull run, having said that, most of these altcoins are pump and dump coins, so they basically just dump after their hype, and there's no way to expect them to break their all time high, even as investors await the altcoin bull run, it should be expected only from altcoins that have a good ecosystem and that is somewhat sustainable in the long run.