Bitcoin wallet security If I use a Bitcoin wallet from say Bitcoin.com and Bitcoin.com folds, will I still be able to download the software and input my pass phrase to get my bitcoin back?
You'll want to save the seed phrase mnemonic (likely 12-24 words long) that the wallet gives you when you first start it up. Doing so is very important!

If Bitcoin.com disappears tomorrow, you'll be able to input that seed phrase into any other compatible piece software. Many wallets use the same key derivation scheme.