My question now is that is it wise that I showed him the amount of Bitcoins I have accumulated before he developed interest?
Showing him your accumulated Bitcoin in your wallet does change his orientation about Bitcoin and what matter most was your ability to convince him which yielded a positive outcome of course showing him your wallet is a practical example which had demonstrated the aspect that investment in Bitcoin is real and possibly he would also other people his wallet too, you did a good publicity about Bitcoin to your friend consequently another new investor is welcome on board gradually Bitcoin adoption is growing and I believe when your friend get back to Canada he would also encourage his close associates or family members to invest in Bitcoin
.Although the OP's intention is pure, about introducing bitcoin to his colleague and inviting him to invest as it is proven to be profitable by showing his own wallet, but I see downside here, he will give hunger to its colleague hunger in a sense that if that person starts to invest in bitcoin and will have a question in mind "why he can earn something like that, while I cannot?" This will give frustration to that person as he sees the huger profit of his colleague, it could go wrong that's why I also not happy that the OP needs to show his wallet, you could just said that it is profitable or such, you didn't have to show it to him as it could give him a different meaning, now that you've influenced him to bitcoin or crypto then its your responsibility to check on him once in a while.
I prefer to keep it to myself and not tell or share it with others unless he shows interest that he wants to know about Bitcoin. Maybe in this scenario, I can still share, at least there is a reason for me to do that.
I'm going to share it because if they want to see what I saw in Bitcoin, even if we say that my motives are good, chances are high that in the end, I'll be the one to blame if they don't make money. After all, Bitcoin is for all investors who will believe in it, whether they know anything about it or not.