No.
1) I presume you paid less than the €24k out of your net pay due to tax relief
2) We've been in a low inflation environment over the past 5 years so you're roughly maintaining the real value of your money
3) We've been through some serious stock market turbulence and you've come away unscathed. If you can't stand the thought of losing money consider yourself lucky and switch to a risk free fund now, otherwise keep going as you are.