His principles aren't inherently Anti-Bitcoin, if I recall the latest disciple to The Ramsey Mindset, George Kamel is open to Bitcoin.

The principles of saving, and consistently investing (into a diversified portfolio) is the a tried, and true tested way to wealth reliably, even if in some cases it takes time.

Overall, putting some additional funds outside our of your primary savings, and investing is into Bitcoin is ok.

When you go all in is when your exposure to risk dramatically increases however.