Recently I meet an investor that are looking for a seller, my customer have (Euros) 3.5 millions for invest in main 100 top cryptocurrencies, due the important amount, He want to trade it face to face in a bank in Spain.
there are anybody here that could sell him or give me any advices?
Do no buy from any person directly. The best bet is an reputed exchange from where you can buy direct. Try bitflyer , they sell directly besides the normal bitcoin trading there. Their daily trading is around 50 million $ and under Japanese legislation. It s legalized in japan and have top 4 banks as partners. So impossible to get cheated by them . Its much safer to buy directly from them.
This is their official address
https://bitflyer.com/en-jp/Best of luck