I won't give you one, because it doesn't look like you don't know anything about Bitcoin, I will or can only talk about why I am investing in Bitcoin, I just want to be successful and the hardest part of getting successful with Bitcoin is accumulating the heck out of Bitcoin with the money that you won't be touching for the next two to three years.
That's actually good to share your experience than convincing him. Since if you can't even convince yourself how would you do well in this industry which rely on your own decisions and knowledge? It would be hard to survive or even profit if you're relying to anyone's opinion then that would be a wrong call. Everyone has their own skills and techniques which doesn't apply to anyone maybe you could gather information which can be used for your own plan. If you're not convince enough just surf the web about Bitcoin.
The only way to survive this is by making money from your business and also running a side hustle, I am already doing this, and as a successful farmer, I am still making some money through that too to support my family, I won't force anyone to invest in Bitcoin as I have failed to do so in last few months, I am surrounded by those who believe that everything related to crypto and online is scams.
The only way to prove them wrong is to let your crypto success speaks for itself.
Well that's a good way to have an extra money for you to invest in crypto industry, there's no doubt that you're good in handling money when you have a lot of sources of money in the first place plus the environment you're in. For me, I used the crypto itself before for me to have an investment here without even using my own money. I created it in here which is still keep going. Maybe someday I'll just prove them wrong with success without even bragging.