What bags do not lose value?

I'm curious, are there any types of bags in the world of finance or cryptocurrency that consistently hold or even increase their value over time? It's a well-known fact that many investments can be volatile and subject to market fluctuations, but I'm wondering if there are certain 'bags' that investors can hold onto with confidence, knowing that they're not likely to depreciate significantly. Could you elaborate on any such assets or strategies that prioritize stability and long-term value retention?