The biggest pain in the crypto world isn't losing money in the market, but making profits only to be frozen or blocked due to "fund contamination." Freezing ≠ illegal; having proper transaction proof can unfreeze your funds, but it takes time and effort. Key tips to avoid pitfalls: do not mix dedicated OTC cards; choose reputable merchants; transfer large amounts in batches during the day, wait three days for the funds to arrive, and include compliant notes. Making money depends on vision, but securing profits relies on risk control!