My question now is that is it wise that I showed him the amount of Bitcoins I have accumulated before he developed interest?
Maybe it's smart because you no longer share your wallet seed phrase with your friends. It might not be wise if you were to share your wallet password. Like you, we may show our friends how much bitcoin we have accumulated. But anyway if your friend can invest one btc amount in the way you educated your friend about bitcoin and as told then your friend's next life will be very happy and peaceful.
It is indeed very impossible to tell other people about the wallet seed phrase that we have and if we choose to show how much we have collected, I don't think it is a problem because this could be a motivation for them to be able to collect it if they really have interest in it. in this field and when they can do it well and achieve what they want, of course we will be proud of the achievements our friends have achieved.