Would it be a satisfactory quantity if I had 0.1?
I don't think there are numbers that we should confined ourselves, as majority of us here are just average joe and regular investors. What's important is that how much you can save and accumulate in your wallet and how much you have profited already if you have been for at least 1 bitcoin cycle already.
If you are interested on the distribution, you can check it out here:
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html
And so everyone can see where you at with that statistics.
But don't forget actually it's distribution of address. There are some important things you need to remember such as,
1. With HD wallet, people is likely to store their Bitcoin in more than one address.
2. Some people use custodial service, where such service use few address which contain tons of Bitcoin owned by many of their user/customer.
3. Some Bitcoiner might have multiple wallet (and even more address) for various purpose. For example, wallet on phone for quick send/receive and wallet on their airgapped PC.