No, most Crimeans do speak both Russian and Ukrainian, just like everyone else in Ukraine, since Ukrainian is the only official language and it's pretty much impossible to not be exposed to both languages, especially in education and media. After the fall of Soviet Union all the ethnic Russians in Ukraine (incl. Crimea) had no way of avoiding it and do speak Ukrainian.
Are you Ukrainian? Have you been to Crimea? A language becoming official (which was only very recent) does not magically make everyone fluent. Sure, Crimeans probably all know some A2 level Ukrainian from media. But they are not fluent and are likely speaking Russian or Tartar at home.
No, most Crimeans do speak both Russian and Ukrainian, just like everyone else in Ukraine, since Ukrainian is the only official language and it's pretty much impossible to not be exposed to both languages, especially in education and media. After the fall of Soviet Union all the ethnic Russians in Ukraine (incl. Crimea) had no way of avoiding it and do speak Ukrainian.