AltQuick.com, a Bitcoin-based altcoin exchange in Dover, DE, will continue supporting Bitcoin Testnet 3 despite Testnet 4's launch. It is the only exchange offering Testnet markets, enabling trading from older versions to the latest. AltQuick.com's no-KYC swap tool and free crypto faucet assist developers in testing on both networks. By maintaining this support, AltQuick.com ensures flexibility and innovation for the global crypto community. Testnet 3 provides a stable platform for blockchain development, with Testnet 4 recently introduced. This commitment reflects AltQuick.com's dedication to providing accessible and secure testing environments for cryptocurrency development and trading enthusiasts.