Minecraft wiki entry for Best_biomes_for_homes, associated text: Wood can be obtained from red crimson fungi trees, a necessary material for long term survival.
If the player has gold armor to wear and gold ingots to spare, piglins can be bartered with for many useful items. See Bartering for more information on what items can be obtained.
Hoglins, while dangerous hostile mobs, are a renewable source of pork if farmed. They can be bred with crimson fungi, although the player must take care to build a safe farm area for themselves.
The weeping vines in this biome are the crimson forest equivalent of the warped forest's twisting vines. Unlike the twisting vines, weeping vines grow downward from the underside of a block, instead of upward. This makes them more suited for creating a safe way down a cliff or ceiling, if used carefully.