"12-15 different Altcoins"... There are not 12-15 solid altcoins in the market, let's be real with ourselves here guys. When the solid cryptocurrencys prevail, it will not be 12-15 that do so, but maybe 5 or 6 at the most.
If you want to see what a solid crypto portfolio looks like you can look at the 4 solid coins I have reviewed here: https://steemit.com/bitcoin/@investingtips/my-investment-plan-for-cryptocurrencies-currently
The market is flooded with great projects that are not in the top 20. If you can't recognize them, that's your choice. People see a 100x in a few months if the market says it's something useful. A 2x in a year is better than keeping in a bank, but we're talking about something else here.