I think owning your own house is a good idea. Owning real estate as an investment is not nearly as good as just owning Bitcoin

Probably depends on which country you're in. Where I live in Australia it's hard to see the real estate market coming down. The dollar will be sacrificed before that ever happening.

So if you have a stable job and you own your property I don't see the harm in refinancing and using some of that cash to buy Bitcoin. Probably should DCA too just in case.