[_delibash_]

There's always a cost. Even if you do not see it in the numbers.

[xtracto]

I think in the case of crypto the cost is the volatility of the coins against the dollar . So that if you wanted to do something with those 64 usd you may end up with 1 million less by the time you exchange it due to volatility and slippage.

[_iswk]

No doubt. But that also applies to the legacy financial system. It's just much more difficult to calculate.