Is it okay to smoke marijuana? Heard its stronger than in the 60s

No one knows. Even the dealer may now know what has been added to the weed. There's talk of more addictive / dangerous substances to enhance the effects, but little hard evidence that this is a widespread practice. A dealer may add pcp and boast of the enhancement. Otherwise, this would be an inefficient use of expensive drugs. Remember marijuana is illegal for whatever reason, and life offers much else. Peace.