There are various reasons why Coinbase disables trading, but it almost always has something to do with the security of your account.Coinbase, like any other reputable platform out there, takes the security of its users very seriously and can automatically impose restrictions on your account if the system detects any potentially suspicious activity. The most common reasons include:Limits This refers to the amount of cryptocurrency you're allowed to buy or sell based on your purchase history, type of deposit method used, and the degree/level of security verification you have completed or accomplished on your account.