RNG = time spent and a lot of luck.
Strange Coins (whether 1 or 500, who cares?) = earned through specific activities or engrams and luck as well.
Who the hell cares? It's a -blam!-ing game, children. Go work and buy a car and/or a house and then brag. Not cry over who had a fictional rocket launcher first lol
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Rng=doing specific activities to try to get lucky. Xur=doing a specific activity to try to get lucky on Friday.