The more you have the better but only money you can afford to lose and it won't affect your life. I started out with over about 10 btc when they were priced around $750 each. If I had started today, I would start out investing with at least 1.5 btc into 3 different altcoins.
Wow, what large amounts of money do you have. I support investments in crypto currency when prices fell by 3-5 times.