The two possible ways to likely HODL bitcoin currently, is either you buy it or you earn it. As for the buying, it's quite simple since all you need to do is just swap some fiat for an equivalent amount of bitcoin. On the other hand some people render services like freelancing and other gig like you mentioned and depending on their agreement with the client , some get paid in crypto currency which includes bitcoin.
The only one I really don't think it would be easy to HODL is selling goods for bitcoin. This is because the seller is would likely have to restock sooner and that won't be long term holding except the profit of course is nice enough to HODL.
Your profile says you recently woke up. Well welcome back to the forum
Don't forget to keep your keys safe
from the many experiences of friends in this forum, from small and easiest things like participating in airdrops and very complicated things like gambling or signing which require consistency of time to get maximum results, but now it is different from the previous year from the beginning of 2017 It's very easy to get results on this forum, like an airdrop, just write join airdrop and the first one will get the prize even though we can't necessarily sell it..and on the other hand, now there are so many players and changes in the rules that I personally haven't been able to prevent their existence, what's new in the crypto world..