I have been buying coins now for almost 2 months but always with fiat money.
So I want to buy some IOTA and Siacoin and maybe some other coins, but that's only possible with BTC.
I have about 0,4 BTC (bought for 1000 EUR) so I could split 500 EUR into IOTA and 500 into Siacoin but how do I do this?
For Siacoin I need to create an account on Poloniex, then transfer all my BTC to there, and buy Sia with it? How do I know I'm not paying more for these coins, when I would be able to buy them with fiat money?
Sorry for this noob question. Trading with coins for coins is still new to me.
Not as hard as you think, you can create account on Bitfinex and deposit 0.2 BTC to buy IOTA, then create an account on Poloniex or Bittrex (recommend use Bittrex in present, better than Poloniex) and deposit 0.2 BTC left to buy SC.
If for some reason, you can not transfer 2 times and only can send all BTC to an address, can deposit to Bittrex first and use 0.2 BTC to buying, then sending BTC left from Bittrex to Bitfinex and buy IOTA