Board Thread:Game Discussion/@comment-73.31.108.110-20171230171011/@comment-26829117-20171230183906

You need a strategy. A couple of pages that might help are:
 * Most Profitable Races - these races can be used to efficiently farm fame to get more gold by leveling up.
 * Upgrades Strategy For 100% Completion - Cheapest car to complete series.
 * Sales This Release - Up coming sales.
 * Gold, Gold and More Gold - cost of winning new cars.

Don't try to complete series 100%. Try to work through the career series to unlock all the bonus series but keep an eye on showcase discounts because at worse you want to try and buy cars at showcase discount. Many cars have more than one so you can work though career without buying all the cars.

As you've reached level 55, you can start to plot a strategy for opening up certain races and certain cars. Then you just have to be patient, farm for gold, try to win cars in new updates and flashbacks rather than buy them. You'll progress faster that way. Check the sales and buy cars you really need.

I recommend building up a gold reserve of around 1000GC and then try to keep it there by farming. This way you should always be able to buy a car you really need on sale if it appears in an update.