An asset that was bought at some point is sold again. Whether after three months, one year or in five years – at some point it is time to realize profits. Everyone knows stories of people who got rich overnight with digital assets. But because of such possibly very high “unusual” incoming payments on the bank account, the bank can temporarily block the account. To avoid problems, investors should inform their bank in advance about the amount of transactions that will soon be received. Banks must of course comply with laws and implement money laundering guidelines. Here it can help to submit a letter from the tax advisor, which certifies that the income is of course declared to the tax office – an important basis for the Bitcoin tax.