I used a similar strategy throughout the past year to accumulate a very diversified portfolio. I had a lot of friends, who are Bitcoin maximalists, making fun of me as my alt-coins continued to depreciate against BTC prices while we approached ATHs in December. Right afterwards we saw the most insane alt-coin surge ever and my investments finally paid off!
This year Im taking a much more cautious approach by buying into only the top coins for now and holding what I have left of my portfolio from the last year. I significantly cut down on most of my alts however I still hold a very diverse portfolio (compared to many).