The ‘I did the math’ section needs to be updated to include the capital losses. If DASH loses half its value, that means that your initial €2500 is now €1250, a loss of 50%.
Sure, your annual returns on the initial capital will be €114 (4.5%), but this means that you would need 11 years of annual returns just to recoup the lost capital (€114 x 11 = €1254).
This distinction is precisely why you shouldn’t compare putting money in DASH to putting money in your bank that pays 0.1% interest per year. In one year that €2500 is still going to be worth €2500 at your bank whereas in DASH you have little certainty on the future value.
Happy investing :)