Hi,
Every exchange adding a new btc, eth, token address on the exchange website.
I think they need some private key to set the transaction on this websites.
So is this private key stored in a normal database?
And is this safe?
The adage in crypto market is hat if you don't have the private keys then you don't have control over the wallet. Most new exchanges are working on improving in security and keeping keys safe but the truth is that it is not safe to keep your assets on exchanges except you want to trade.