Who is going to pay the bill?

[kleinkrypto]

Im relativly new in trading crypto, but it works for me, nothing bad happened so far. But i just have a question:

Im taking lets say like 0.3 BTC to an excange and buy one or a few interesting altcoins. Im waiting for a few hours, sometimes a few days and then changen them back to BTC with a nice profit. Now who is the one paying my profit??? Another trader with an unlucky hand?

[kleinkrypto]

any answer would be appreciated

[Niya]

People who buy the altcoins previously bought by you will give you profit. But note this not a 'zero sum' market, so it doesn't necessarily mean that you profit only if someone else lose his money. You are just doing a short term speculation.