A centralized cryptocurrency is just digital currency. It may be cryptographically secured against unauthorized transfers/access, but if it doesn't employ some sort of game-theory based custodial sharing scheme which is intended to incentivize decentralization of control (successfully our not), it's not using the 'crypto' protection in the special sense that cryptocurrency implies.

If it's centralized there's no point in having it be a distributed consensus blockchain. The only reason to do so would be to play on people's ignorance for marketing reasons. That or maybe they really are ignorant themselves, but I doubt it.

"cryptocurrency" refers to a very specific type of currency that happens to rely on cryptography, but the defining aspect is its decentralization.

You should learn the meaning of cryptography!

https://en.m.wikipedia.org/wiki/Cryptography

I don't see how the Wikipedia page contradicts what I said

Trust in it to do/be what?

Trust in it to maintain its value if it is a stable coin. Alternatively, trust it not to be hacked or inflated if it isn’t. (As well as trust it to maintain whatever monetary properties they advertise to give it value as money.

I see. Thanks for clarifying!

Why is that? And what's a centralised cryptocurrency?

Could you expand on this?