All of them are scams! If some professional trader has the capability to trade and earn a good amount of money every single day/month, why he would need other people's money? This is the first thing to understand. The behavior is very similar to ponzi schemes and must be avoided by all means.
You have responded very nicely. But what I want you to know is that some crypto experts are good entrepreneurs that always want to scale any business with innovative business models.
In this case, the trader may consider that to achieve high volume of trade then he needs other people's money which at the end of the day people will earn and he will make huge profit.
Its about scaling an idea or a business...