If traffic is trending higher, could it mean that it is a perfect time to add the budget to capture leads through paid marketing?

No student traffic growth or trending higher traffic for a specific time could bring lots of negative and hidden business analytics that would cost you more.

So, you should not either overwhelm just seeing the trending higher traffic or add and invest more budget on any paid marketing channels to run a paid marketing campaign instantly, i.e. 

Sponsored Content, Search Engine Marketing, Influencer Marketing, Email Marketing, Pay Per Click (PPC) Ads, Social Media Ads, and Social Media Marketing Partnerships also add budget to the overall Digital Marketing Campaign.  

Non-Strategic and Non-Analytical investments in paid marketing could be the reasons of:

Business downfall, losing business investments also return on investment (ROI), and becoming hopeless in online business just because of allocating a huge budget in the paid marketing just seeing the trending higher traffic.

“The real traffics equivalent to normal heart rates, so if your web traffics growth rate equivalent to abnormal rate then, must diagnosis that website traffic” -Momenul Ahmad

Now, let's try to define the perfect time to add budget in a paid marketing also unveiled that what should I do after seeing the trending higher traffic should add budget? Investing more in the running paid marketing campaign or not to add budget in the paid advertising?

Traffic is trending higher cause of automated traffic, so it's not a perfect time to add the budget in paid advertising and overall paid marketing campaigns. 

If traffic is trending higher, could it mean it’s a perfect time to add the budget to capture the leads and generate sales?

No, you don't do this cause higher trending traffic to a website indicates something alarming and cautious that is run by a similar business owner with the opposite mindset (business competitors).

Competitors run such types of trafficking campaigns in favor of you to drive the automated traffic through purchased or exchanged traffic to your website to misguide you.

So obviously, you shouldn't add budget a paid marketing just seeing the trending and higher web traffic growth rate.
Before investing more in paid marketing, please follow these comparative analyses lists, and after that, if you think that it's the perfect time to add budget to paid marketing after seeing the Trending higher traffic on your websites:

* If traffic is trending higher, then analyze the traffic source, heatmaps, and onsite spending time duration (period time 7, 15, 30 days), read more- https://www.seosiri.com/2021/04/paid-marketing-during-traffic-trending-higher.html