is bitcoin open way forward money launderer to get safe money,i asked that because its appear that bitcoins is verry hard to control or track
Yes, bitcoin is an easy medium on money laundering, but that doesn't mean that you won't get tracked with your activities. Taint analysis helps track where the coins go after a certain transaction until it stops. The hard thing is, even if you kept track of coins and managed to locate the last address it landed, you'll still get a rough time on linking the address towards a certain person or user.