After gaining substantial returns in the crypto assets market, many investors can't help but worry: if they convert their digital assets into fiat, will they face questions about the "source of funds"? In fact, as long as the funds remain on-chain or within the exchange, there won't be too many issues temporarily. However, the real challenge begins when deciding to turn those profits into cash.

First of all, investors need to be wary of the risk of "dirty money". Although blockchain transactions are public and transparent, it is difficult to confirm the true identity of the transaction counterpart. If one inadvertently receives funds related to illegal activities, even if it is unintentional, they may become entangled in legal disputes related to "aiding information network crime" or "concealing and disguising criminal proceeds". Many ordinary investors thus become innocent scapegoats for the circulation of illegal funds.

Secondly, the bank's risk control system is also a major obstacle. If there is a sudden large deposit after a period of low account activity, it will inevitably trigger the bank's automatic risk control mechanism. The bank may freeze the account first and then conduct an investigation. To lift the freeze, investors need to provide complete proof of the source of funds, including exchange records, on-chain transfer receipts, initial investment evidence, and so on. However, most people do not usually keep these detailed materials.

It is important to note that participating in crypto asset trading itself is not illegal; the real challenge lies in how to securely convert digital assets into fiat. To reduce risk, investors should develop good habits from the very beginning: properly preserving exchange transaction records, on-chain transaction screenshots, initial investment certificates, etc., to form a complete proof of the funding chain. This way, even when facing bank risk controls, they can prove the legitimacy of the source of funds, avoiding unnecessary troubles.

Profiting in the crypto assets market certainly requires insight and expertise, but safely cashing out those gains requires careful planning and preparation. Investors should not only enjoy the benefits brought by digital assets but also fully recognize the potential legal and financial risks, and take appropriate preventive measures.