@Sansebastian and if $LIN reaches 480 in a few months, you'll be biting your own backside. And this probability is quite high. The long-term chart of Linde over the last 30 years shows this quite clearly: basically, you always buy them at the highest price.
@BulgarianSplitStocks That may be, but if you look at the past, the share may fall a little further. Let's take the rainbow EMA indicator as an example. A good opportunity in the past has always been when the price falls to the pink lines. I try to stick to this and it has worked really well so far