If grin takes of and gets a big user base we might see a scenario where more grins are actually lost/destroyed then are being made,and if so the price will be stable and even go up.
Is this going to happen? Well the world economy is not a zero sum game, and the world economy is growing rapidly so there is room for a expanding currency, that’s why the US dollar is not in hyperinflation.
All new dollars printed are absorbed by the expanding economy. This of course only works if the currency is widely accepted on a global scale.
As I understand it grin is anonymous and untraceable, this might not go down well with regulators, and they might ban it from exchanges and on/of ramps.
If so, then it won’t be a popular global currency, but rather a fringe currency traded on a few shady exchanges with a small user base, and subsequently die from inflation.
If on the other hand it is not banned, and if it grows so big that the demand is equal to or outgrows 60 grins a minute, it might be the actual world cyber currency of the future for payments. (rather than bitcoins roll as digital gold/storage)
The road there will however be long and hard, and in the near future the supply will vastly outgrow the demand, and as a consequence the price will for the years to come be very low.
And some easy to use wallets need to be developed soon, and app wallets must integrate grin, and major exchanges must add grin.
A lot of ifs, but success is not against the laws of economics.
When Coinomi or Abra integrates grin I might buy some.
Why don't you mine some? It's fun to learn and all you need is a GPU card or two plus the rest of PC (CPU, memory, SSD, motherboard, powersupply).
I am not sure that price would be very low as VCs are mining it (invested at least $100mil).
Mining is much less risky than buying outright.
Sorry, plucking my favorite parts of your post...
I also think that bitcoin being a store of value and grin being spendable (inflationary, but less and less in %% going forward) could be a good combo like checking (grin) and savings/investment (bitcoin) accounts.