I own different crypto and mostly I stake with them because I am interested in the long return. With bitcoin I am actually doing nothing.
If you are primarily interested in the long return, then hodling bitcoin is your best bet and would potentially bring you more profit than staking assets which are built on the PoS model. Not to shot on proof of stake, but one of the main reasons bitcoin actually increases in value is due to the controlled and reducing supply and how no one holds more stake on the network.
Can you suggest any strategies to make even a little APR? I know that I can't stake with bitcoin.
There are third party services that you can technically stake your bitcoins with, but as a common rule; Not your keys,Not your coins.
While I get your point of view, there are times like this that I regret not being active in trading. For instance, I could have sold my BTC at ATH, a few weeks ago, and now I could have obtained a significant amount of BTC, by purchasing, using the exact same amount of money. It's called short-trading, while at the same time, I would continue holding.
On the other hand, there are quite a few things that can go wrong, such as an unexpected price change and so on, however, now I'd definitely have more Bitcoin.