I don't know in your country, but here all exchanges are obligated to report all transactions to the government
If you buy Bitcoin in a regular exchange, you are automatically in a position to pay taxes on capital gains
P2P is kinda hard/insecure/limited here as well
Decentralized social media is excellent in theory, but in some time, some relays become the centralization. Whether you have 150 relays, your followers, family, and friends must be in the same.
I tried to submit a note to 6 relays, but 3 of them rejected my content. Those 3 that are still working are the centralization.
One goes down, and you lose your content. Everything is much more volatile than in a centralized company that sells your data to make money.
It's terrible to be the product sold, but you keep your content. No matter what.
PS—Sent to 6 relays, probably saved in only 3 again