Somewhere I already saw a similar question!!! In fact, everything is very individual and depends on the style of play, the speed of the blinds and how many tables you play!!! If it's a tournament with a 5-10 minute blind increase, then of course it's better to register at the beginning, but if it's a tournament with a 12-20 minute blind increase and you play a lot of tables, then many players find it pointless to waste time starting such a tournament from the very beginning, but better focus on the tables you are already playing at and register a little later with a comfortable amount of blinds of 50-60bb!!!