False. Algorand has safety, unless you get confirmation from 2/3 of the "money", you don't go forward. The best you can get here is a denial of service.
Usually, for distributed systems in adversarial settings we talk about safety and liveness. Bitcoin doesn't have safety, and both bitcoin and algorand seems to fail the liveness test as well.
In your terms, both bitcoin and algorand have weak availability.
* Bitcoin loses consistency
* Algorand loses availability
I'm glad Algorand exists so that systems which value consistency over availability can be built.
[0]: https://en.wikipedia.org/wiki/CAP_theorem