After how long is it safe to say my baby will sleep through the night?

Shelby
My LO (10 weeks) has slept at least 6-7 hours straight through the night every night for the past three weeks! And the last 2 nights he has slept for 9 hours! (Such a blessing!)
Is it safe to say that he will sleep sleep through the night now..like consistently? I don't want to jinx it lol 
Also he has been sleeping in a Rock n Play sleeper and I am about to move him to his crib, so should I expect him to wake up more often during this transition or has he developed a good enough sleep habit for this to be a smooth transition? He is already sleeping in his room alone.. just haven't put him in the crib yet. Any tips on making this transition easier?