Totally agree with what you're saying OP and I think that it's a common sense anyway that you only should invest what you can afford to lose and not go all in and then starve yourself of your needs and then end up losing a lot of things besides money at the end of it. There will be people that will disagree and that you can invest little by little, they are right but I'd rather get out of poverty first and as quick as possible rather than stay there just so I have some monthly savings for a future that is still uncertain given that I'm still impoverished.

I mostly agree with what @Cypherpunkz said but I'm not sold on the 4th one, you can invest in bitcoin in the short-term if your goal is also short-term, that's how some people get profits all the time, they invest and wait a little and then get it out when they're in profit, not really a big deal but I think that those people do deserve to invest especially if they're making money out of short-term investments.