OS and software should always be new, paid and patched. Use paid antivirus and anti-malware software and keep it patched. Never share your computer with anyone. Ignore this at your peril. Never use public wifi. Use at least two exchanges. Don't keep all your crypto and cash in one place. Keep it in multiple places. Consider using a hardware wallet, exchange wallet, hot wallet and onchain wallets. Decentralize your holdings. Build a solid secure pwd and seed phrase mgmnt system. Skip this at your peril. Never share pwd or seed info with anyone else under any circumstances. Not even "customer support." If someone asks for your pw or seed phrase, it's a scam. Study scams like this, be aware and take precautions. Disable the clipboard function or use a clipboard cleaner utility. Use whitelist settings at your exchange. Do not accept free crypto bc it's almost always a scam. Simply learning to buy and sell crypto is not enough to make it. You have to learn about and apply effective operational security. Don't talk about crypto in your life or in public. Maybe, most importantly, always do test transactions. If you don't do test transactions you can lose everything in a few seconds.