Yeah, it's anyone's guess on where the price for silver, gold, numis, semi numis, bullion, blobs, rounds, etc...will be in a year, or two or 10, 20, 30, 40 years from now. I buy with a long-term hold perspective of about 15 - 20 years. I've diversified between semi-numi bullion and numi coins. I've made zero investments into 'generic govt bullion' such as maples, eagles, philharmonics, and others of like kind. Those follow the price of spot, with very limited ability for premiums to rise much above spot (plus a small % above spot). One needs to be careful in buying collectibles. I've seen folks jump head long into say the ANA 1 oz Anaheim PF70's for $500, 600, $700.00, and there is just little chance for these things to appreciate in value...IMHO...whether short, medium or long term. I could be wrong, but I just don't see it. Not with a mintage of 2000, an okay design, and a show medal. But if you picked the ANA PF70's for $180.00'ish, then I think you are sitting in a good spot to have prices appreciate in value. So, when buying collectibles, you have to be sure you're buying at a favorable price (as much as possible). Another example is the World Heritage Series. I was an early adopter of those at $480.00. They are beautiful. There are only 50 of the silver version minted. They were selling for $1000 - 1200 about 8 months or so after release. So again, be careful not to get caught up in the hype with the collectibles.
Regarding the semi-numi play. Same lesson. When they first get introduced, MOST of the time are priced to sell...but over time the price increases, and if they are popular, prices increase pretty quickly. I think of the 2016 Pandas. I bought a slew of them for $20.50. Spot was a bit lower (15'ish), but the premiums on the pandas have gone up substantially. I heard that the 8 million were gone by June. The same with Kooks. The same with Lunars. It all depends on popularity, design, and quality.
I love me some numis and semi-numi coins, not so much govt issued bullion.