I always buy the new gold coins (Euro). I invest around 110€ for a 100€ legal gold € that can be used either for casual trading in a supermarket or sold to numismaticians for a much higher price. Those coins are usually worth much more right after obtaining them due to their authenticity certificate.
For example: the German 100€ gold coin from 2002 is already worth 531,70 € (link for proof (it's in German though): https://www.scheideanstalt.de/deutschland-100-goldeuro/
) So yeah. Where else can you get 400% on your invested money in only 15 years?
Other than that I'm a friend of the Islay distillery Laphroaig, which grants me access to buying special whiskey of limited editions that are only sold to friends of the distillery. I have 2 of those whiskeys now. I got the first one for 150 € (0,33 l only
) and it's worth around 300 € now after only 3 years.
What makes me confident? Well those gold coins don't lose the value since they're made from gold. The higher the gold price goes, the more I'll have when I finally sell it. Thanks to their different imprintings, they'll be worth much more, but it basically can't drop below the original investment. That's why it's very safe.
And concerning the whiskey: There will be idiots who drink their bottles or open them and thus they'll lose value. But when those people do, my whiskey will gain value. So yeah, it can only go up as well. Luckily I lost interest in opening the 2 bottles since I already tasted those whiskey on the whiskey festival in Berlin.