It's easy to say this. It's so easy to say that it has been said numerous times already here in the forum, but the reality is that, it's hard to apply whether you're a newbie investor, or has been investing in crypto for quite some time.

When you feel that you can make lots of money by investing into Bitcoin, you will have this feeling where if you will put a larger amount of money, you will make more money as well hence, they will be putting money that they can't afford to lose. I've seen it with many investors already where they're having regrets and disappointment of themselves because of going all-in into Bitcoin or other altcoins only to end up losing in the end. Yes, Bitcoin is a safe investment, but it isn't 100% lose-proof and at some point, you will still lose some money investing into it.

If I would rephrase the bolded text, I would say "Invest if you can invest, but be ready with the consequences that you can face along the way." Also, this might be a bit negative, but if you can take a loan, go for it and buy Bitcoin. I'm not saying that you can do it anytime, but there are some factors to consider like the current state of the market, and the income that you have.