definitely no gambling, too easy to lose. Perhaps more conservative routes like faucets, simply purchasing, holding, or investing.
holding is definitely not growing your bitcoins.
Anyway, try saving wallets like haobtc or Magnr. Theres a new one coming up which I cant remember the name off my head, it was featured in some crypto news site
How can it be growing? You will still have the same amount of bitcoins after all that time. Only the fiat value of these bitcoins can be higher maybe. But the question was about growing bitcoins which means, in my opinion, to have more bitcoins than before at the end.
It's why i have programmed a system where one have more bitcoin at the end than at the start.
But what do then people here?
the do not analyse my system...they say just:PONZI.
So far my first investors have made good profit.
The next ones will do as well.
I'm not here to convince you...I'm just here to inform you.
After 100 days all is clear...one can see that I was right and my detractors wrong.
The ones who invested have more btc (satoshi) than at the start.
The non-investor have the same than at the start.
What should I do more and why?
No reason to do more:
because my fun is reached...I have programmed a system and if one person invest in it is enough
if zero person invest in it it does not matter...the few satoshi made by the system go in my poket.
No matter what happens...I have my fun.
It's not about the first investors. First investors in a ponzi or pyramid game often have more than before. It is about the last investors who will lose everything or most of their investment when the game collapses because no new investors can be found.
Next thing is, are the numbers backed at all when everyone wants to withdraw? A website can show all stats it wants, but that doesn't necessarely mean that the funds really exist.
and if the collaterar worth 0.06 i think better to give 0.03 for secure 
) But if you are really looking for another site as a fiverr alternative that do accept bitcoin, try making a thread on the service discussion. Good luck on your search 
