Can someone please advise if I am taking enough precaution when transferring btc to dnm's.
Basically I buy from a source to a third party wallet then transfer from there to dnm to be used.
I have heard about tumblers but not sure if it was a good idea, I don't know many dnm's that it is compatible with.
Depends on source of BTC for most. If you paid in cash not anything to worry about. Pay through a site(ex. coinbase) then it would be suggested for you to send them through a tumbler(ex. Helix).