The original of the parable says: "Give a man a fish, and he will be fed one day. Give a man a fishing rod, and he will be fed all his life."
It goes on to speak of a lazy student who also hoped to receive fish every day.
There was then a newer saying, some sort of mockery towards those who love to go fishing and it tells:
"Give a man a fish, and he will be fed one day. Give a man a fishing rod, and he will be gone all day long drink beer and pretend to be fishing."
Back to OP, it depends on the person you "give Bitcoin". Some will live long and will always have money to feed their family (selling some satoshi when in need and maybe even buy them back when possible, or get the taste and trade or simply earn/work for bitcoin), some others will sell all the coins at the first occasion they get (or first time there's a dip and some FUD).
Yes . Not all people are suitable for fishing.
Some people may only teach him how to put the fishing rod and he already knows how to raise the fishing rod after catching a fish. Some people teach everything to them. He may forget quickly or learn the skills.
Fishing also has tools, such as fishing rods and fishing nets. Some people are suitable for fishing rods, while others are suitable for fishing nets.