altcoins are great for flipping for more btc but dont every marry a coin. When btc goes on a run past all time highs you dont want to be bagholding ALTS. You will watch them get crushed. I personally was bagholding alts from 4k-20K and they got demolished I even had friends saying man you must be doing well with those bitcoins you have 
In the end alts went nuts and I did well but If I would have waited till BTC topped out I would have made more. So moral of the story there is dont marry a coin/project they and watch your btc shrink get in and get out after you make decent profits. Sure sometimes you can buy an alt an maybe 10x-100x on it bagholding, but there is 1000s of coins out there that wont make those type of gains. Anyway do whats best for you but dont be that guy married to a bag watching btc head to 50-100k or whatever the top might be
In the end alts went nuts and I did well but If I would have waited till BTC topped out I would have made more. So moral of the story there is dont marry a coin/project they and watch your btc shrink get in and get out after you make decent profits. Sure sometimes you can buy an alt an maybe 10x-100x on it bagholding, but there is 1000s of coins out there that wont make those type of gains. Anyway do whats best for you but dont be that guy married to a bag watching btc head to 50-100k or whatever the top might beI believe like Bitcoin there is always some altcoins that deserved to be Holding for long term,It is not just Marrying them but at least trusting them to bring us income in the near future.
Yeah Holding too much sometimes bring failure but it doesn't mean it will happen every time.
i have been profiting from altcoin since then so i am not supporting the totality of this thread but i respect the point as much i wanted to be respected in my stand.