...and I suggested long investment for him but he said he likes the short term investment because he can feed from it and I told him that, he can't invest in bitcoin and still feed from it.
There's no rule as this. You can invest in bitcoin and still feed from it especially when there's upwards movement, you can take profit and take care of yourself. So, the bitcoin belongs to the investor and the investor has the right to withdraw anytime and sort himself out.
That would be considered trading and the potential investor here is not very knowledgeable about bitcoin or trading. For someone who has no job and is planning on investing his pension in bitcoin, how would he handle the risk of losing since the market can move in an uptrend and downtrend? Investors who do not have other means of income usually find themselves in life situations where they sell their hodlings irrespective of where the market is at.
OP hasn’t updated the thread on the meeting with his pastor. I think that will give us information on whether the pastor invested in bitcoin after the suggestions and advice from this thread.