Even though it'd be mostly pointless since you will not have escaped the traditional monetary system being correlated to the dollar.
The correlation I was trying to make but, its true we can't say it's completely scalable given the fact that, you've got to pay some transaction fee of which have been on the rise due to the by pass of most projects from hosting there ICOs on the bitcoin blockchain to Ethereum's.
Most stablecoins just run on the Ethereum mainnet, with that, making them unscalable by default. Transaction times and fees of Ethereum. To me, for a cryptocurrency to reach its goal of global adoption, worldwide instant transactions, anywhere anytime. It should, ofcourse have instant transactions - and second, have extremely low fees >$0.01. Especially needed for less developed countries where sometimes in peak network stress fees can go all the way up to monthly salaries.
Speaking of instant transactions with less fees, do you doubt we won't come to that? Not to mention, you could have a fee as low as $1 using whatever exchange to transfer stable coins using Binance smartchain. When the congestion is evenly spread across for most projects, we would have a speedy transaction timing.