Honestly on that decline I didn't buy on that occasion because I thought it would fall below $90K but the correction didn't go there, so I'm a little sorry too for just monitoring the market without taking action to buy.
Not just you, I believe that with the not so optimistic news related to the trade war launched by Trump. There wouldn't be many people brave enough to take action to buy yesterday, except for the big whales in the market. Everyone is shouting that this is a good time to buy but in reality in that situation, most people are in waiting mode because they are afraid that bitcoin will drop further and not many people dare to buy.
Even if bitcoin price drops below $90k, I doubt people will buy and will instead wait for lower prices. To put it bluntly, buying bitcoin at this time is very sensitive so it is normal and there is nothing to regret if we do not buy.