“Mad Money” host Jim Cramer answers callers’ stock questions at rapid speed during Friday’s edition of the lightning round. 39GobuyCNBCcramerCRAMER39ScryptocryptocurrencycurrencyethereumEthereum39HUTinvestinvestinginvestment strategyJim Cramerkramerlightninglightning roundMad MoneyMiningretirementstock marketVideosVlogwall streetYouTube