Just trade with the belief to start with that the value of your investment will probably go down.
I beg to disagree on that. If your assumption is that your investment will probably go down in value, then you're not really investing at all.
That way you can hunt and test the better projects... And one day be pleasantly surprised!
Investing and playing the lottery are very different things.
Depending on what country you're in, trading or at least high-volume trading may equal to financial suicide because of the tax guidelines.
It's different if you know for sure that you can do your trading completely anonymously. But assuming you're able to make profit, you're still going to have to find ways to spend your money if it is to have any value at all. Crypto-fiat gateways that do not require any kind of KYC are few and far between. If you cash out very large amounts of crypto into fiat without being able to explain the origin of the money, you might be in trouble. The same goes for crypto payment processors.
I think what he means is what I also believe, assume a complete loss at the start as it takes the emotion of actual loss out of it and one can make better decisions.
Sure. Hardly anyone can afford to have fear in the driver's seat in crypto investing and trading. This stuff is not for the faint of heart.