I never want to invest on any of altcoins by selling my bitcoins because I knows that bitcoin has more potential than any other coins so it will give more benefits in future if we hold until,if you invest on altcoins you can invest the amount from profits of your bitcoin.
Do you read the articles?and do you read the OP?seems like your on the other planet huh?
Op says "would you sell all your altcoins just to buy bitcoin"
If my altcoins comes even closer to my target price why not,for sure i will buy bitcoin because this coin is worth holding that all the altcoin in this cryptocurrency