The point is that you shouldn't invest in an asset without understanding its properties.

I help my friends buying Bitcoin and I make sure that I prepare them for the huge risk they are taking.

You help them by explaining that it would be a mistake to regard an 80% - 85% decline as brutal?

Yes, I myself have been through multiple of those, and it's important for people to expect it.

The most brutal things for me were about losisng/forgetting/not writing down correctly passwords, exchanges being gone with part of my money, even though I tried to be very careful. Being 80% down is nothing compares to.these kind of (not as rare as you think) events.

I expect adoption in waves, not linearly.

+200% APY is an excellent store of value.

Do you think 200% annual growth is sustainable? Do you think that would make for a useful currency? Why do you think economists consider low (but positive) inflation to be desirable for currencies? Do you think such growth, mixed in with sporadic 85+% drops (aka: high volatility) is a good attribute for a currency?

No, 200% APY in waves is expected as it becomes the reserve currency. Then it grows in value at a rate equal to the growth in productivity, closer to 0%.

States think positive inflation is good, because it's a hidden tax that they profit from. I think 0% inflation is better for all participants.

Yes, I think growth in waves is a great start for a money. Same thing happened with salt, gold, and other commodity monies.

That's not how a store of value is supposed to behave. It's supposed to be stable, it shouldn't go up or go down faster than inflation/deflation.