The main question is, why was the BTC coin chosen as the main coin for deposits? After all, we all know that this network takes a large Commission per transaction and works quite slowly.
Nobody is making you use Bitcoin if you don't want to. You have alternative coins that you can use if you are worried about waiting to long for your Bitcoin to get confirmed. You are free to use Bitcoin Cash, Ethereum, Litecoin, Dogecoin and Tether. But if you believe the Bitcoin network is slow, take a look at what has been going on with Ethereum lately and how the fees have skyrocketed.
but the site accept other coins aside from bitcoins ? if yes , thats great because they need it for those who dobt like to use btc because of btc known problems. its not that they avoid btc because its slow but they avoid btc because of the crazy fees too when sending and withdrawing . slow speed can be fix by paying more but why would you do that ? eth has a high fees but that wont happen without a reason. they accelerate the speed atleast