I would still say $20k is a big amount and your friend should not really have trusted you with this big sum. Investing in bitcoin can definitely make us earn really good profits if compared to other financial sources but we can never ignore the risk involved. People like your friend like to play safe. These people would consider investments to be safe in any centralised asset like gold or stocks but when it comes to bitcoin, they would always have the benefit of doubt.
He convinced his cousin to invest Bitcoin, he didn't say to convince his friend. I think you need to read the thread first, bro.
A cousin of mine working in Malaysia called me a while back; he had accumulated a significant amount of money in his bank account and wanted to move it elsewhere, so I suggested investing in gold and Bitcoin.
I agree, $20k is quite big amount of money. However, his cousin finally agreed to invest in Bitcoin. So, OP actually succeeded to convince his cousin investing in Bitcoin.
He eventually agreed to invest in Bitcoin, and I hope he sees profitable results.
His cousin invested in Gold, but he was not really sure with Bitcoin because of its level of risk. However, his cousin finally realized the advantage of Bitcoin because he agreed with OP.
If this is his first investment, maybe he could have started with less than 10% of the total available funds. Even 10% seems a lot to me because I can only afford to risk 3% tops on any single trade/investment. Now, your friend has all eggs in one basket.
Yes, it was likely the first time his cousin investing in Bitcoin. If he has invested in Bitcoin before, he won't be doubtful with Bitcoin. Anyway, his cousin has invested his money $20k in Bitcoin. So, it is useless now to advice him to invest 10% only into Bitcoin.