Call me dumb or unlucky....anyway. I have few questions if you could help. First one, Is it too late to invest in Bitcoin, Litecoin Ethereum?So far I've used therocktrading exchange and It's been ok. but i know of the risks of usind an exchange. I've eard about the Ledger nano s, and for sure it's way more secure, but how does it work if I want to buy or sell? do I tranfer my money into it from my the rock account, then when i want to sell or buy next?do i still need to use an exchange then transfer my cryptos there, make the operation then back to the nanos? Also what if I want to trade altcurrencies that are traded only on specific exchanges? For example using IDEX market and a nano s? Thanks a lot guys