(Best buy is the proof libertad set!!)

I buy gold for "wealthprotection" so closest to spot and these can be sold in times of trouble easily for spot again. Numismatic coins : there are far too many coins so they are hard to sell in the future; Only the proof coins like ducats (NL) sovereigns (UK) (proof libertads) and some other countries have large collector groups. But they are expensive already at the start. So stick to spot is my advice.