E
Mark 16 NEVER suggests that believers follow after those signs; rather that the signs follow after believers.
Mark 16 accords well with Paul's snake bite after he was shipwreked on Malta.
It also accords well with the martyrdom of Hermias of Comana on whom scalding and poisoning were both unsuccessfully attempted.
Those people who handle snakes or ingest poisons intentionally ate putting God to the test.
Matt 4:5-7
5 Then the devil took him to the holy city and set him on the pinnacle of the temple
6 and said to him, "If you are the Son of God, throw yourself down, for it is written, "'He will command his angels concerning you,' and "'On their hands they will bear you up, lest you strike your foot against a stone.'"
7 Jesus said to him, "Again it is written, 'You shall not put the Lord your God to the test.'"
ESV
IMO Mark 16 was intended to assure people who were experiencing persecution that God is still in control.
Mark 16 accords well with Paul's snake bite after he was shipwreked on Malta.
It also accords well with the martyrdom of Hermias of Comana on whom scalding and poisoning were both unsuccessfully attempted.
Those people who handle snakes or ingest poisons intentionally ate putting God to the test.
Matt 4:5-7
5 Then the devil took him to the holy city and set him on the pinnacle of the temple
6 and said to him, "If you are the Son of God, throw yourself down, for it is written, "'He will command his angels concerning you,' and "'On their hands they will bear you up, lest you strike your foot against a stone.'"
7 Jesus said to him, "Again it is written, 'You shall not put the Lord your God to the test.'"
ESV
IMO Mark 16 was intended to assure people who were experiencing persecution that God is still in control.
another one of those when we get to heaven we will find out things.