I mean, the post itself is pretty poor quality, but that doesn't mean that the sentiment behind it is necessarily bad advice. Dollar cost averaging is a perfectly legitimate investment plan, and over a long enough time period with bitcoin would always have made you a profit so far.
the important question when considering DCA is
can you outperform the market?considering the fact that
97% of traders lose money, i would assume most people are incapable of doing so. from a long term investment perspective, they are better off using DCA.