i am afraid i choose none of your choices here. they are all bad in my opinion. and for a big investment like $25000 i would only invest in bitcoin and if anonymity is what you want then use a mixer to reach that. the safest investment specially if it is for long term is going to be bitcoin for the foreseeable future.

and among the altcoins specially with "anon feature" the best thing is Monero. it has been around for long enough, it has real anonymity and not just playing around. and the price is pretty solid although it is a little over the usual price.