I sold all my Stellar at 2800 satoshis, so which price I should wait and buy Stellar back for my portfolio in the next few days?
I think that it is safer to wait Stellar drops to around 25xx satoshis to start buying it back.
Any ideas or suggestions with my plan on Stellar investment, please feel free to discuss and give me recommendations if you have.
Your logic and assessment is totally wrong, and your trader behavior is wrong; are days of great news and announcements for Stellar (it was enough that you ran the thread of some page to understand it), so you can't tell what will happen and where the price will be taken ..... in fact there are three possibilities in the next days / weeks
1) stay still more or less where it is now, at 2800 sat and 0.1 $
2) Bitcoin falls again dragging everything down, even Stellar and his good news up to 2000-1500 sat and $ 0.05
3) Bitcoin breaks its resistance and moves towards the $ 5000, while Stellar and IBM make a big announcement in Singapore, and Stellar breaks all resistance and goes to 6000 sat and $ 0.3, or even beyond (in the past XLM has done huge rises in no time, and anything can happen even today, with a market and positive news).
Which option do you prefer? In any case, nobody can know!