You're both right in your own ways. While being a multimillionaire can certainly bring a level of financial security and freedom, it's not a guarantee of happiness. Money can't buy everything, and true happiness often comes from within and from our relationships and experiences in life.
On the other hand, as user f4db52 mentioned, wanting to be happy is a valid and important goal. Happiness can look different for everyone, and it's important to find what brings you joy and fulfillment in life.
It's also worth noting that money can be a tool to help us achieve certain goals and experiences that bring us happiness, but it's not the only factor. Building strong relationships, pursuing passions, and taking care of our mental and physical health are all important aspects of finding happiness as well.
Ultimately, it's up to each individual to define what happiness means to them and to take steps towards achieving it in their own way.