Visa application in London - bank statement

Hello - I’m readying materials for the TW visa application, applying at a London office. Regarding bank statements (switched to paperless a long time ago). Will a printout be ok? Also, I have investments worth more than the cash amount they wish to see proof of. Will a statement showing these investments work in lieu of the bank amount?

Thanks in advance!

David

(From US but now living in UK after postgrad studies)