If one is going to invest in "cloud" mining, why wouldn't you go through Hashnest?
No contract length, and you get to buy it buy the TH/s, and can sell your contract, later.
At least then, you'll have a pretty good idea that there truly is mining equipment backing your contract up.
Bitdeer looks too good to be true, as a generality.
And most bitcoin users know exactly what "too good to be true" means.
Do not make the mistake of assuming that I am a newbie who does not know how to distinguish shit from chocolate.
BitDeer is the official mining sub of Bitmain and if you are doubting Bitmain then you are doubting
nearly half of the hashpower of BTC as of today.
There is nothing on Bitdeer that is too good to be true, and if there is, I suggest you to let be known here in this thread for everyone to criticize, including myself.
edit :
I don't trust hashnest because in my book,
they are too good to be true. Although safe, I assume. I'd much rather go with Onehash instead of anything else as they
seem more professional in every aspect.