Actually I did respond but it seems the mobile steem app failed and the message never went through.
I'd be happy with whatever amount you can safely afford without ever going into debt or anything like that. The thing is, half of a millionth of holdings is still a lot of money for any global reserve currency and all the app gives you is a goal, not set in stone.
Something that I like about this strategy is that even though one may never reach the goals, we'll always be happy that we did as good as possible without overinvesting or underinvesting in a particular coin or going into debt. I sleep soundly every night knowing that I have a diversified crypto portfolio.
And that is the key. We know that cryptocrurrencies will take off, we just arent sure which ones.
My holdings basically are BTC, LTC, ETH, STEEM, and BTS. I feel very comfortable with that at this point. I also have a decent stake in a coin I mentioned a few times that is out but having the platform around (website, wallets, etc) updated. It passed the trial phase, now it is being fully automated.
I feel I have the basis for continued growth the the big three (BTC, LTC, and ETH) and the potential for explosion in STEEM and BTS.
Since you are invested in the top ones you can always play around with the upcoming ones I guess, as long as it's play money, life's gotta be fun too