What do you mean with 'they take the same swings in value'?
I agree that when comparing bitcoin as an investment to sdice as an investment, no need to convert in USD. Is that what you mean?
Yep. That's what I mean.
I think there probably is less gambling when the price shoots up so quickly. I also think we saw trading of S.DICE itself go on hold while the price was shooting up because people wanted liquidity so they hopefully cash out at the height of the bubble.
But I think the 19% return number is the fair way to measure returns in S.DICE, since my alternative is holding bitcoin (0% return in terms of BTC) or investing in some other bitcoin denominated stock or bond.