What do you mean by “I bought a domain”? Is the domain has been rented or there is someone who sells domain for life and heritage?
The Matrix.org is Community Interest Company registered in UK, and its full name is THE MATRIX.ORG FOUNDATION C.I.C., please, consider this as a proof proof.
Given this information, I would guess it’s relatively safe to donate/give funding to the Matrix.org because its financial flows should be protected by UK law.
BUT, it seems they never made a full report of incomes/spendings, the first one is expected in April 2024. But it’s already April 2024, and I don’t see a report. Anyway, it’s better to read original Issue in regard of such things, I might understood it incorrectly
I believe crypt.ee isn’t self-hostable, I haven’t found self-hosted options on their site and there is only “web-client” repo in their github (https://github.com/cryptee)
Edit: fixed typo