Tumbling is a service that has worked well in the past. With the rise of the darknet, tumbling has become more of an outdated service. Many tumblers risk your opsec, or just scam you of your coins. Tumbling your coins is still better than not tumbling them, but they will not protect you. This cannot be stressed enough, chain anylsis can very easily track your coins back to you even if you use a tumbler. We will cover better methods later.