The current Falcon 9 Block 5 is a very powerful rocket, and is more than capable of getting the Crew Dragon into LEO.
It’s so powerful that Musk wanted to cancel Falcon Heavy except he couldn’t due to a military contract.
Thanks Mm62:
[snip] Confirmed earlier this year in a quarterly NASA Commercial Crew update, SpaceX assigned Falcon 9 Booster 1051 to Crew Dragons debut launch. That rocket booster and its complementary upper stage are already at SpaceXs McGregor, TX rocket testing facility undergoing a number of acceptance tests and checkouts as of today, confirming a number of critical facts. Most importantly, the presence of integrated the B1051 booster in Texas appears to imply that SpaceX has successfully fixed slight design flaws in their Merlin 1D engines and composite-overwrapped pressure vessels (COPVs), even if the paperwork to officially certify them for flight has not been completed. [/snip]
https://www.teslarati.com/spacex-crew-dragon-launch-debut-spacecraft-hardware/
I'd like to be around for the launch of the first SpaceX BFR next year. Bigger than Saturn V.