I want to ask which altcoin is most suitable for donations.
i.e. traceable, and can be given to organizations without issues.
Not every altcoin is accepted for donations. I think if anyone accepting crypto as a donation , they only take Bitcoin You can also use DASH XMR BNB as some sites accepting these coins for donations. But if you're concern about privacy then just use an exchange to hide your address. You can also use Crypto Mixing sites to hide your address.