VALR - Buy and sell cryptocurrencies
Coinbase - Bitcoin, safe and easy.
Meme exchange - An actual meme-trading exchange
Accepting - All the places that let you pay with Bitcoin
Pangolin DEX - A community-driven decentralized exchange for Avalanche and Ethereum assets with fast settlement, low transaction fees, and a democratic distribution–powered by Avalanche.
Fliqpay - Accept cryptocurrency payments worldwide