good strategy, but what do you think in which edition it is most worthwhile to buy and hodl the legendary gold foil cards?

In the long time perspective i guess the CL gold foil cards have the biggst potential as they are still "cheap" and will be printed way less than the newer reward legendary cards.

E.g. i love void dragon or adelade brightwing which "only" cost around 100$ these days. Probably prices of these golf foil cards will be >500$ pretty quick after all packs are sold out.
The newer reward cards are at least just as good as the CL legendaries, but the supply is 5-10times higher conluding a lower potential in price development... However, regarding oshannus the card is sooo good, I can hardly imagine any limits on the price development..