If you want to hodl, what's the best strategy for doing so? A single wallet or several? What are the advantages and disadvantages of both options? Maybe it's stressful to use a wallet with lots of satoshis? (whereas several with fewer satoshis is less stressful, isn't it?)
I believe everyone should have at least two wallets, one cold storage wallet, this wallet will hold the majority of your funds, it can either be in an airgapped wallet or in a hardware wallet, this wallet will never be connected to the internet, ever. Your other wallet or wallets can be online wallets, and they will only hold a very small amount of coins which you use for spending on the go, or for testing and other different kinds of stuffs.
Currently I have several wallets but when I store my assets, especially bitcoin, I still keep it in just one wallet until now because even though maybe doing it in several wallets is more protective but my capacity is not too good because I still tend to be careless with ownership even though until now I still feel safe and comfortable but the risk of forgetting and not being careful makes me try to minimize it more so I keep my assets in just one wallet which is intended so that I still remember the wallet as a core part that I must take good care of.
Although there are several other wallets, I don't really use them as asset storage because my focus is only on one wallet to store assets, the rest are still used but only for transactions of some needs and even though there are assets, they are only a small portion or even a few percent of the total ownership I have in my one core wallet.