So ROI comes in the form of coins being deposited into your wallet and not in coin appreciation?
Correct.
1 of something worth $2 is the same as 2 of something worth $1.
With all fixed supply models (bitcoin et al) the price is the variable.
With Radix the supply is the variable. Granted, the attempt isn't to "fix" the price, but to substantially smooth out the high volatility through autonomously generated supply based on the demand.
Our test scenario where we ran several years of bitcoin txns (over 500M) through the model from day 1 through (I believe) 2015 produced a variance of around 3% +/- from the initial bitcoin value.
With that decreased level of volatility you don't have to sit around and hope/pray the price doesn't crash, but can go about your day and just login whenever to get the latest dump of back paid interest on your existing holdings. And if you are running any of the services that provide features for the network like marketplace, chat, mail, distributed exchange, apps...etc then you'll get rewards of new supply as the economy inflates.
This is the worst idea I've heard for a long time.
Crypto market is hot though, so there should be some hype and if it trades quick enough, Radix can probably turn a profit till people see it action and realise they've just brought a version of the flawed central banking concept to the blockchain but with a currency nobody is mandated by law to pay taxes in or use.
Does it actually buy supply back when there's little demand at least? If not it's the equivalent of a no/low inflation POS currency but with the invention/addition of a virtual whale that dumps on the price whenever it starts to actually gain value...