I have invested in ETH when it was $105. Now it's $176. Will it be a good idea to take the profit now? Or I should hold on for better profit which may lead to less profit too 
Suggestion is appreciated.
You better take the profit you have got. Your investment has already gone up by 76% and I think you should be contented by that. Sell the and extract your capital, then hold the profit. Suggestion is appreciated.