which coin is good to invest for a long run after bitcoin? I do not have much knowledge also tell me best exchange to buy coins.
I must recommend you ETH. ETH is second largest coin for me after bitcoin. I still hold eth after a year even though the crypto currency is falling down. I still believe in bitcoin and eth that the crpyro currency is our future currency. That fiat will gone, only digital money will use and the bitcoin and eth will become very successful