Realisticly, what are the chances of overdose on crystal meth, and how much do you have to smoke for a possibility of that happening?

realistically it should not be indulged in, for its harms are innumerable, including death and with no health benefits. Overdosing depends on many variables eg . health, co -morbidities, quantity, amount etc. Suggest spend time on safer and less destructive topics and things

Here's the problem with your question. What you buy on the street typically contains 10 to 15% methamphetamine. The other 80% is regular amphetamine, caffeine, toxic chemicals, benign cutting agents, and more recently, fentanyl. Fentanyl kills you in a single sitting because its impossible to control the dose without sophisticated equipment. Everything else damages you from long term chronic use.