Don't trade with BTC.
Just buy it and hodl it.
Invest, - be smart.
This guy said it already. Never use your Bitcoins for trading but we can't stop people from doing it and are eager to spend and risk their BTCs to the market. If they don't have any other means to trade and their BTC capital is all that they have, I'd tell them to stop and try to save first with another spare money if they want to hustle with the market. The times are coming and it's going to be harder to acquire BTC from time to time and these experiences might be worth it per se but it's more worth it to just watch the market do its own thing while you do yours and that's to do nothing but hold.
You are right about one thing: trading is risky. You are also right that saving up other money first is way smarter. Thats good advice. But I think I would ignore the "just hold" part if I want to learn about trading, but its a big risk. And trying to get money from trading with only bitcoins is really a bad idea. If you don't really know what you're doing, trading Bitcoin is basically gambling. You could lose it all. And yeah, Bitcoin might get harder to get, but that doesnt mean you should risk what you have.
Trading and holding contains both risk but if you want to choose the lesser one, holding is the choose. I agree that if you don't know what you're doing, you're doing it wrongly and might as well just avoid trading and accumulate through DCA. Going ahead and choosing what's best to accumulate more will define of what kind of risk taker you are. No stops anybody if they want to show up and choose trading but the brutality of the market will make you choose the safer option.