No. That is trade volume (amount of BTC changing hands) not the amount of transaction fees collected by miners.
To calculate ROI you need to look at the amount of TX fees collected instead.
If Sia becomes dominant in storage industry, it's volume should be higher than that.
Really? How many tx can fit in a Siacoin block and how many blocks per day? I think you'll find it's not enough to get anywhere near "high volume".