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actually i did but in a pretty fake site, luckily i didn't lose any money from my pocket but the profits from the investment were gone!

I reccomend coinmarketcap.com you can see the volume of each coin on each exchange. So u can just go on the biggest mostly the safest.

Coin Marketplace

STEEM 0.06
TRX 0.31
JST 0.060
BTC 65994.94
ETH 1984.18
USDT 1.00
SBD 0.50