Bitcoin was never worth 1400 euros. Maximal value in Euros was around 1050.
I still know a couple of people who didn't sell their "old bitcoins" in the last bump which went with around 1400 eur per bitcoin, so they are still keeping 100+ bitcoins just as a security, they don't have to pay taxes on them, they don't need the money and they are slowly spending it.
I would personally sell that amount next time it reaches 1000+ eur, but overall I would do the same, just keep it until it makes sense to sell it.
@OP: 10-30 Bitcoins is actually not much, it is between 10-30k USD. This is the price of an average car. There are also many account with 1000+ Bitcoins and the most of them were early adopters. There was a time when you could easily mine blocks with your average-joe computer rewarded with 50 Bitcoins each. Also, there were times where you could get 10-20 Bitcoins for each faucet request. This is no longer imaginable today, but this was at times when Bitcoin was only worth a few pennies.