Thanks for your reply. I was not aware of that. I did not check out the former corrections yet, but will have a look. For now I only trade alt coins, so this is something to keep in mind.
Btw: Your post on your portfolio made me overthink my strategy. I will try to adapt by diversifying more into main coins, which gives me buying power for BTC or ETH pairs. If BTC drops one more time I'll change now, if not after the first alt impulses.