While dollar cost averaging has both pros and cons, the biggest pro is the peace of mind it brings. You can create a repeat buy schedule and leave it on auto pilot, without having to watch the crypto currency price every day. If your time horizon is long enough, there is a much higher chance to benefit from using this strategy
If you make a lump sum investment, you'd be stuck watching the price you bought at and might have a lot of panic selling tendencies due to market volatility. This is not the case with DCA as you invest small amount over (ideally) a long period of time and average out your cost. Regardless of the news, price movements, FUD and everything else going on.
Does this mean you will always come out ahead ? Absolutely not. If it was that simple, everyone would now be a millionaire. However, it is a tried and true way to be more disciplined with your investing and be more focused on the long term.