Native English speakers, can you help me, please?

[Linz87]

This is my basic edit, but you might want to check that it still reads the way you want it to. As you said a few verb tenses were off, and while I could understand it all, some sentences read a little bit awkward so I rearranged them. Also, I put a 'u' in 'savoured'... you don't need to if you're in the US, it's up to you.

"One of the most discussed topics concerns the relationship between money and happiness; the question in this regard is simple but the answer’s difficult: “does money bring happiness?”.

Happiness, as the poets say, is an instant, an unrepeatable moment in time. Happiness is that elusive chimera everyone chases, but it’s very difficult to achieve and too short to be savoured. Money is a medium of exchange which is assigned a value that is often excessive.

“If I win the lottery, I’ll stop working, I’ll move to a tropical country and I’ll always stay on the beach.”; who has not said it at least once? Certainly money has an importance in life: with it you can buy things you need to live and more, even things you don't need. You can have a comfortable life, you can go travelling, find new places, you can have fun. However, there are negative aspects: you can become a miser, and for the love of money you can lie or cheat, you can lose relationships with your friends and/or family, you can bribe, you can exploit or be exploited, you can steal or be ripped off, you can kidnap or be kidnapped and you can even kill or be killed.

Concluding, beyond money there are more important things of value such as love, friendship and relationships with the people you care about. Money can buy a book, but not the knowledge; money can buy a bed, but not the sleep; money can buy a clock, but not the time. Certainly money is important in life but we must not make this medium a goal. Happiness can't be bought with money, but by relationships, by friendship and by love."