Well depending on where you buy it from you are definitely paying a mark up... but designer pieces are so pretty! I wouldn't wear something just because it was gold... half of what makes it pretty is how it is shaped into something gorgeous! I've fallen in love with some VCA pieces and the mother of all "designer mark up debates" on this forum, the Tiffany diamond ring (LOL!) ... but I wouldn't buy it as an investment. To me it's a beautiful object and something I can hand down to my children that will have enormous sentimental value and, yes, will keep quite a bit of it's value if not 100%.
I myself could never ever buy something super expensive (like a porche or a birkin bag) though - because they depreciate the more you use them and definitely do not retain value! A diamond will always have value but I would be horrified carrying a $10K bag that could get ruined with one coffee! That's just me... because I would probably ruin it the week I bought it... and to me a beautiful bag is still just a bag. But then I have the VCA 20 motif MOP necklace and I'm sure the markup on that is huge!! I'm sure some people would think I was crazy, and if I really thought about it I might even feel like I got ripped off... but it's just so pretty that every time I put it on I'm happy! And that's worth something!
I say buy what you love... save up for something special and don't feel badly about paying 2x the price for the Love bracelet if that's what makes your heart sing... it's not just about the materials, it's about design, style, how it makes you feel, and yes, a little bit of bragging rights sometimes too sometimes!

It's exclusive and that makes it special... and that's okay I think. I wouldn't go into massive debt to buy one... but as long as you are happy don't let how your parents behaved make you feel guilty about it!
And yes, gold continues to be a good investment - supposedly rare coloured diamonds are an amazing investment right now, so I've heard!