Anyone looking into "bitcoin vs ethereum" is measuring coins against bitcoin, the one most people meet first. Players who pay a casino in crypto often weigh it against USDT or Ethereum, wonder whether bitcoin and cryptocurrency mean the same thing, and ask whether holding it is allowed at all. Each comparison below takes one of those questions, explains what sets the coins apart, and says nothing about where any price is heading.
Bitcoin vs Ethereum comes down to purpose and design. Bitcoin was built mainly to send and store value, and its network does little beyond that. Ethereum is a platform that runs smart contracts, small programs that execute on the chain, and thousands of tokens are issued on top of it, including one version of USDT. Its own coin, ether or ETH, pays the gas for every transaction there, so a wallet holding only tokens still needs some ETH before anything can move. The two coins have separate networks, prices and address formats.
For a casino player the comparison has practical effects. A balance kept in bitcoin rises and falls with its price between sessions, while a USDT balance aims to keep its everyday value but depends on its issuer. USDT runs on several networks, so the network chosen at the cashier must match the one used to send. Tokens on Ethereum need ETH in the same wallet to pay gas. The law that governs gambling with crypto is the player's local law, whatever the casino's own licence says.
No. Some countries regulate it, some restrict it and a few ban it or key uses of it, so the local rules decide.
On the reserves its issuer reports holding and on trust in that issuer, which can also freeze specific addresses.
Centrally issued tokens such as USDT can be frozen at specific addresses by their issuer; bitcoin has no issuer that could do so.
Every transaction on Ethereum pays gas in ETH, so a wallet holding only tokens cannot move them without some ETH.