I do not mean to speak ill of Dash, since in my portfolio I have a lot invested here, however, no matter how well Dash does it from now on, compared to BTC for example, the price evolution has been a clamurous failure.

I remember when a master node cost more than 100 BTC, and now for less than 4 we have one and we have plenty.

As an investment Dash has been a failure. I think that is undeniable.

What I do accept is that as a currency for daily use, it is the best I've ever tried. However recently, using ETH I have noticed that their transactions are almost instantaneous, and that is deteriorating the advantages of Dash.

What can convince me to keep my Dash for another five years, and not hope that soon a master node will be worth 1 BTC?

I still trust it is the currency, and it seems fantastic to me, but I have to admit that there are many fantastic coins out there. Much more than there were five years ago, and that will make future decisions difficult for people when it comes to choosing Dash or another new currency.

All the best