I suggest you to stay away From Bitcoin mining sites, because the amount of Mining Bitcoins is half after halving. And now all the Bitcoin mining sites are Scamming people.... So Stay away from all Mining sites....
No it will not happen if you know that the place you put the money to invest in the mining sites if they are actually running their businesses like genesis mining is one of the trustworthy sites.
are you sure they will not scam us because last time people said hashocean are trustworthy cloud mining sites but in the fact they were gone now however for me currently mining aren't profitable any longer especially after halving i think may be they will cut out profit users became a half
Yeah that's right even the top cloud mining sites is still tempt to turn to scam and ran away the investors bitcoins.
I think i doubt that on what you said that mining aren't profitable anymore because you can see that the price is rising and helping the miners to make the mining still profitable even though the block reward will be half and the mining difficulty will increase.